Deformation measurement method and device

Abstract

The present disclosure relates to a deformation measurement method and device. The method comprises the following steps: obtaining a first height field at a first moment and a second height field at asecond moment of a to-be-tested region on the surface of a to-be- tested member relative to a marker, respectively; and obtaining a first image at the first moment and a second image at the second moment of the to-be-tested region according to the first height field and the second height field, respectively. A force-chemical coupling mechanism is determined according to the first height field, the second height field, the first image and the second image. The deformation measurement method and device in the disclosure carry out analysis according to the characteristics of the height field onthe surface of the to-be-tested member; the operations are simple and easy. In addition, the present disclosure is capable of obtaining real-time data of the to-be-tested member during the process ofhigh-temperature oxidation, thereby obtaining the growth thickness of an oxide film of the to-be-tested member in different regions, which facilitates to investigate the oxidation kinetics process ofmaterials under different stress states and can reveal the force-chemical coupling mechanism more objectively and comprehensively.

Description

technical field [0001] The present disclosure relates to the field of metrology technology, in particular to a method and device for measuring deformation. Background technique [0002] With the development of aerospace, energy and power industries, high-temperature materials including nickel-based superalloys and niobium-based superalloys have been widely used. For example, the thermal efficiency of a steam turbine increases with the increase of operating temperature, so increasing its operating temperature becomes a feasible means to improve energy efficiency. At the same time, higher temperature puts forward higher requirements for high temperature resistance of materials. In order to improve thermal efficiency and ensure normal operation of equipment in engineering, a series of high-temperature structural materials are often used to replace conventional materials. Under working conditions, the above-mentioned high-temperature structural materials tend to undergo obviou...

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Problems solved by technology

However, it should be pointed out that most of the above morphology methods are off-line detection methods, and it is often difficult to obtain the data of the material during the high temperature oxidation process. At the same time, for the oxidation behavior of the material, its stress state and microscopic morphology are often not uniform. , so the oxidation kinetics in different regions of the material are not completely consistent

Therefore, the above methods have limited effect on the study of mechanical-chemical coupling behavior.

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